Malicious PDF — malware analysis report

Static analysis result for SHA-256 302e56f4d964430f…

MALICIOUS

PDF

82.4 KB Created: 2021-09-05 14:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4539b27ea59c676ad143d58018cfc7ce SHA-1: 0aa47bee3b1bea90ec83ef9c212f2f3a55b65574 SHA-256: 302e56f4d964430f53a3f8574f1e1daa09d02a2a18e11f1b885ca1b93d88b751
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a ML classifier and ClamAV, indicating malicious intent. It contains a link farm with numerous URLs pointing to potentially compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farm characteristics strongly indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://szaniterplaza.hu/ckfinder/userfiles/files/xalafelirutidomis.pdf In PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160def47971e65---murikifepu.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///88470420023.pdfIn PDF document text
    • https://33mobility.net/uploads/files/37644638497.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a28c53436---38859940194.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/budunamuwuwapudatawer.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/kugujujariwamo.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c38a2712b25---wixugedupozob.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160908514c5606---41064038476.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/20u1kmv03hj97fj73nkadn7ct4/23199516483.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/zotanokolab.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/wumut.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f3cd2cdf1---19076625158.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/24687432420.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/53359281782.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f989a0b876---24863513498.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/gilitazasobetu.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/72510097586.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af5db3dc97d---romafubabuwam.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/76429705763.pdfIn PDF document text
    • http://productosole.com/wp-content/plugins/super-forms/uploads/php/files/ot78vv0n5cdekuimte3rbtnhnp/36715129764.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/dagabubaxipawim.pdfIn PDF document text
    • http://markone-tools.com/upload/files/sitesemabuj.pdfIn PDF document text
    • http://hrudolf.com/userfiles/navabusudokunamelu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=titik+refleksi+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F5 10160 bytes
SHA-256: 4be4ad26e23ec582ab24705a8314a1e7d79dd21c8b2dddd59f579f1245f58b6b
font_02_sfnt_off00010ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECD 17328 bytes
SHA-256: 2bdf9f34c0b4ee82bdbd0b87b6a4974ef5e0c4914b109c161ffa796426582232

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